66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
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/************************************************************
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yycsusiz.cpp
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This file can be freely modified for the generation of
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custom code.
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Copyright (c) 1999 Bumble-Bee Software Ltd.
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************************************************************/
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#include <stdlib.h>
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#include <string.h>
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#include "clex.h"
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#ifndef min
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#define min(x, y) ((x) <= (y) ? (x) : (y))
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#endif
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// the Visual C++ v1.52 compiler generates an error in NT if this isn't present!
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#ifdef _MSC_VER
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#if defined(M_I86HM) && defined(NDEBUG)
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#pragma function(memcpy)
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#endif
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#endif
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int yylexer::yysetunputsize(int size)
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{
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yyassert(size >= 0);
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if (yyunput_size != size) {
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if (size < yyunputindex) {
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return 0;
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}
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size_t unputbufcharsize = size * sizeof(int);
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if ((int)(unputbufcharsize / sizeof(int)) != size) {
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return 0; // integer overflow
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}
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// allocate
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int YYFAR* unputbufptr;
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if (size <= yysunput_size) {
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unputbufptr = yysunputbufptr;
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}
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else {
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unputbufptr = (int YYFAR*)malloc(unputbufcharsize);
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if (unputbufptr == NULL) {
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return 0;
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}
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}
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// copy
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if (unputbufptr != yyunputbufptr) {
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size_t charsize = yyunput_size * sizeof(int);
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memcpy(unputbufptr, yyunputbufptr, min(unputbufcharsize, charsize));
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}
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// free
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if (yyunputbufptr != yysunputbufptr) {
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free(yyunputbufptr);
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}
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// assign
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yyunputbufptr = unputbufptr;
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yyunput_size = size;
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}
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return 1;
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}
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